Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbba7692c1f27f6f…

MALICIOUS

PDF

72.3 KB Created: 2021-09-05 22:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a25a9df0e20419b715b70bdf9b083196 SHA-1: eb333a09e3851a3c44749a769d1c3c055c037902 SHA-256: dbba7692c1f27f6f0798199266ee92e50ff715412f460f4c6939d4781ec81a3d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it likely serves as a phishing lure or a distribution point for further malware. The heuristics reveal it functions as a link farm, with many URLs pointing to compromised CMS upload directories, suggesting an attempt to host or distribute malicious content. No scripts were extracted from this sample, limiting the analysis of its direct execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dab0b188e0---lunafibix.pdf In PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/7476830642.pdfIn PDF document text
    • http://psychologkmalinowska.pl/ckfinder/userfiles/files/batilixoja.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/71538604705.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/6032773815.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160890e53f3164---11851769139.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e289a796f---38396405654.pdfIn PDF document text
    • https://bahceneryaman.net/public/content-images/files/77617714143.pdfIn PDF document text
    • https://nhorizontours.com/userfiles/files/pewerewarorog.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/kawepimubereter.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/291405349864.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/89304072529.pdfIn PDF document text
    • http://okzawidow.pl/img/upload/files/27463237071.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e331ca3f56d---teteburuxuzufarepemotog.pdfIn PDF document text
    • http://doverhighschoolhalloffame.com/clients/2/2d/2d76883e1086210ef8e2c43836b0327f/File/favofetafewiwirevomirus.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/xenesorog.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/16072ebfbebfd7---favapogejixetitega.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/6976512251.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/vqiu6scdv8rgmaesregfl4dfc0/vaxeriruvojaliwetogigig.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/54623248226.pdfIn PDF document text
    • http://condominiobrisasdelnorte.com/userfiles/file/tovozatilukuzeg.pdfIn PDF document text
    • http://hf1968.com/clients/48820/File/zowodutuviditivi.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/99232972022.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109007c07ed9---8082347675.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/lakelurupikeb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=neft+full+form+sbi+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD2 10612 bytes
SHA-256: 40ea8beb9e910e183b37e56ae8ad0d4f9d70a72affc037b6e5c637d853d3e05d
font_01_sfnt_off0000d2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eaf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF5 16060 bytes
SHA-256: 06a312f20a0a60db57dd4daa5ff746fbfeaa234b0a990e3aaf7f84dd612c95e3

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